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[2023-05-07]. (原始内容存档于2023-05-11). Needham, Volume 3, 535. Mapping China's World: Cultural Cartography in Late Imperial Times (页面存档备份,存于互联网档案馆). Richard J. Smith
"Confusion as to the extent of the Chang Chenmo valley between the Lanak and Kongka passes continued to be a feature of Chinese cartography even after the Communists